dlctes.f3

Usage

Functions/Subroutines

logical function dlctes (zr, zi, d)
DLCTES

Function/Subroutine Documentation

logical function dlctes (double precision zr, double precision zi, double precision d)

DLCTES

Purpose:

!>
!> DLCTES returns .TRUE. if the eigenvalue (ZR/D) + sqrt(-1)*(ZI/D)
!> is to be selected (specifically, in this subroutine, if the real
!> part of the eigenvalue is negative), and otherwise it returns
!> .FALSE..
!>
!> It is used by the test routine DDRGES to test whether the driver
!> routine DGGES successfully sorts eigenvalues.
!>

Parameters

!>          ZR is DOUBLE PRECISION
!>          The numerator of the real part of a complex eigenvalue
!>          (ZR/D) + i*(ZI/D).
!>

!>          ZI is DOUBLE PRECISION
!>          The numerator of the imaginary part of a complex eigenvalue
!>          (ZR/D) + i*(ZI).
!>

!>          D is DOUBLE PRECISION
!>          The denominator part of a complex eigenvalue
!>          (ZR/D) + i*(ZI/D).
!>

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Definition at line 67 of file dlctes.f.